430

430 is the natural number that follows 429 and precedes 431. In written form, it is four hundred thirty and, in Roman numerals, CDXXX. It is an even, composite number.

Mathematically, 430 factors as 2 × 5 × 43, the product of three distinct primes. Its positive divisors are 1, 2, 5, 10, 43, 86, 215, and 430. The sum of its proper divisors is 362, which is less than 430, so 430 is a deficient number. In different bases, 430 can be represented as binary 110101110, hexadecimal 1AE, base-3 120221, and base-12 2BA.

In historical contexts, the year 430 CE is notable for events in the late Western Roman Empire. It is the year traditionally associated with the death of Augustine of Hippo at Hippo Regius (present-day Annaba, Algeria), a key Christian theologian and philosopher. The following year, 431 CE, hosted the Council of Ephesus, an important early ecumenical council.

In science and measurement, 430 nanometers lies in the blue portion of the visible spectrum. While 430 itself is primarily a numeric label, such values commonly appear in discussions of wavelengths, colors, and related spectroscopy topics.

Overall, 430 is a small, well-defined integer with several simple representations across numeral systems and a modest place in historical chronology.